William t



W. F- COBB.

Tenoning Machine Patented May 19, 1868.

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' -Lttars PatentNo. 78,060, dated M11319, 1 868,

mofl ALL WHOM '11 MAY CONCERN:

Be it known that :1, WILLIAM FJCO'BB, of Whitestown, ,inthe countyof'Boone, inlthe Stoteof Indiana, have invented a new and usefulImprovement in Tanning-Machines? and I do hereby declare that thefollow-5 ing is a full and exact description thereof, refei-en cebeinghad to the accompanying drawings, and to the letters at rference markedthereon-Q Figure 1 represents a front elei ntion of-my new machine.Figure 2 represents o. side elevation of the some; and I Figure 3 is aview of the adjnstable chisel detached; t v p An iron frame, B, isfastened to the tahle A, upon which tho lumber rests. The cruise,whlchnre-fastcried to frome B, are made fast'by sctews to'the block D,andg s'upp ort the operating-mechanism aboye the table, A. The centralblock, D, is perforated with four holes, through which the fixedg'uidesrods, e a z r e inserted. The slot m, in the centre of the blockD, is made for the chisel-rod, b, to work-in. thesidcs of the centralblock, D, there 'are two plates, 1 1, on which. lips, 2, ore formed, toserve as supports jnnd guides for thefour rack-bars, 3,which connectth'e;chisel-bar holders or-'gi1 ides," 1. The racks, 3,'-ser"ve toadjust the chisels, with their holdjersand guides,towards or from eachother, which maybe done by the crnnk,:5, with its'shaftnnd two pinions,6,.which work one-both edges of block D, and mesh into the two pnirs'yfrack-bars','3, The supporting guide-rod's agapass through the chisel-barholders or guides, 4, solos toperinit them to be hdjustd-bythe rock's,

- -3.' The--- fi*ont;ehisel-bar,.7, is slotted, to correspond'with theslot mgirr central hlock'D, and a shipping lzttch,

8,'is hinged-to the her 7' below the slot. Latch .8 may be thrown intoconnection with the chisel-rod 6, as himcete d in dotted lines, or itmay he thrown outwardly, so es" to connect with pin 9, which projectsfromtheside' of the chisel-liar guide,- 4. The curved notch, near theupper end of latch 8, will, when shipped'into the position indicated indotted lines, embrace-theohisel-rod,'.b,' fi'ud therehyjthe chisel bnr,7, will be forcedto 'ascend and descend with the rear chisel-her,thro'i'zgh which the chisel rod 6 also ,pass es, ,and, bj noving'hitch 8outwardly', so as to connect it with the .pin 9, the chisel-rod, 6, willdescend in theslot m, and the slot in jchisel-bsr,

7; leairi ng it et rest,"-while therear. chisel. can be operated alone.The pitxn'hn o connects ,treadle or curved coupling-iron 7:,aml'tliel-atter is'fastened byitsL-l-owe'r mow the chisel rod b, reari 'o'fithe central hlock, D. The guide-130d P is also connected with thelchiselrcd b, and extends through a centrolfvertical hole the, bent inthe.uppor.por'tion of block D, and at its upper end iii-connectswithretracting-spring S. It will now he understood that the chiseis willbe rinsed by the action of spring-S,afteibeing caused to descend-by theaction I of. trenrlle'i. By'means of the rocks 3, pinions-fi, andcrank.5,'-the chisel-holders or guides, 4, may he adjnsted, cnusing the spacebetween the c'hi'sels to'he varied tolsnit different kim'l's of work.The screw-bolt T- will serve nskn gauge, b y'which to limit thc distance between the chisels Q Q front time to .ti1ne,-e.s;ma.yhenecessary,to

' form tenon sof diflerent thicknesses. ".lhc chiselsgre formed with anangular blnde,'i'or the purpose of formingthe shoulder-of tho tenon; atthe same time, making the'sideof it; Thefchisel inny be made separatefrom thechi'sel hars, find fnstenedto thcniby nuts and bolts, win anysnitzible manner. The chisel represented in fig. is formed-of the partsQ -Q which are, connected by a liinge-joint,'r. ,The set-screw t isembraced by the arm d, as represented in the drawings, and enters thenot a, connectedwith'thechiseLbar 7', and a link f, is

connec'ted by pivots with .both the chisel Q and the nut c forinll atthe bottom oi. the chisel-bar. By means of slots in the chisel-bar head,and screws in the chisel Q whichp'a'ssthzonghithe slots, the chisel,orthat part marked Q may be adjusted longitudinnlly, by means ofset-screw t, which adjustment will cause the two parts to occupy theposition indicated at y, in dotted lines, or they may beset at rightangles; I Chiselssq formed and connected m ay be u'sed-te'form tenonswith shoulders standing at an angle to the tenonle'ss then a' rightsingle,

which in certain vkinds oi work is Ycry important. The bracket, Ren'dscrew serve to clamp endhold' the 'lumber to he worked;

1 5 To cut a, tenon on the end of n'piece of lnmher, it will beheld bythe set-screw U upon the: table A, with the end upon which aitenonis-to-he made'longitudinellyvplaced between the chisels Q Q when themovement of the treadle will canse the ,chisels to descend and cut awaya portion of the wood, so" es .tolform a tenon.

What I Clilill1,flfld desire to secure oy Letter Pdteni, i s- 1. The,adjustable chisel-bar guides 4, 1ael-'L-b:afs 3, crarlk 5,: block D andits plates 1'1, iirfenged and eperhiiirigc pnjqintly, .as m idfor thepurpose described v 2--v Tlle consir'u'etion of the chisel, consistingof the blade Q, 'ettached to the blade Q by the hingc-jolnt 1-, l andafijustable by mean sof screw t end link f, working in the arm e,whereby the chisel may cut a, tenon-nt a right angle or 'liss, ,ll constrigetd uid 'drfang'efl-f te 'op'eiat'e fib stant'ially gs deeribed.

In ize'stimony whereof, I have hereunto set my hand, this 25th day ofJune, 1867. l v

- l WILLIAM ;CO BB.

and pinions 6, inombinatipn 'with centre] -Wic'ness es: PUGH, I l

WALHGREGORY-

